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Halfinator build - LiFePo4, Bluetooth, HP-10W

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eshroom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eshroom Quote  Post ReplyReply Direct Link To This Post Topic: Halfinator build - LiFePo4, Bluetooth, HP-10W
    Posted: 21 January 2021 at 1:20pm
My halfinator build with HP-10Ws and PHT-407Ns. Started with some CNC cut ply, we got the sketch up design a bit wrong, but managed to make it work. CNC cut grooves make it much easier to screw together without having to glue to prevent air leaking out.

I also made my own custom battery with built in BMS. The cells were cheap LiitoKala LiFePo4 cells advertised at 7ah, in reality they push out 6ah, which is still excellent. In 6s2p, the battery is 12ah 19.8v. An alternative I considered was https://hobbyking.com/en_us/turnigy-4500mah-6s2p-30c-lifepo4-pack - removable batteries. - Turnigy 4500mAh 6S2P 30C LiFePo4 Pack, but I'm happy even though my battery is almost 2kg - and it lasts forever.









I cheaped out on the amplifier with a https://aliexpress.com/item/1005001504672923. - 100W TPA3116D2 and added a separate https://www.aliexpress.com/item/32985158255. - bluetooth receiver board, actually I tried to make the whole thing as cost effective as possible with many parts ordered from AliExpress. The amp isn't great, after summing the input to mono, the gain seemed to drop significantly, I also don't think the amp can handle top volumes. For normal indoor listening the amp was still extremely good for the price. There is pop and since I added the bluetooth there is hiss too.

I have now got hold of a Sure Electronics / Wondom JA31182 and will install it soon. I'm hoping this will be a big improvement.









Messy wiring as the speaker was taken apart and put back together for testing and adding bits.





Fused, two power switches to isolate battery for charging while powered off or running directly off mains power. The Wondom board would negate the need for this, as it can handle battery charging, but I will probably still keep things as they are.

Voltmeter with built in two QC 3.0 USB charging points.





Happy with how the final thing has turned out, aluminium edge trip, acoustic foam and black grill to give the speaker some extra protection from bashing and some splash resistance. I just wish it was a little lighter!



Edited by eshroom - 21 January 2021 at 1:27pm
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bass*en*mass View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bass*en*mass Quote  Post ReplyReply Direct Link To This Post Posted: 21 January 2021 at 5:50pm
well done!

Nice to see some more diy projects on here :)
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JonB67 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JonB67 Quote  Post ReplyReply Direct Link To This Post Posted: 21 January 2021 at 7:45pm
Yup, nice to see people building again. Good job!
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kipman725 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kipman725 Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2021 at 11:06am
nice job, looks sharp.  You should stick a 35mm pole mount in it so you can raise it above the ground.
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eshroom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eshroom Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2021 at 4:45pm
Thanks for the comments, and great shout on the pole mount!
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